/Engine/Source/Editor/DataLayerEditor/Public/DataLayer/DataLayerEditorSubsystem.h
Assign new unique short name to DataLayerInstance if it supports it.
bool SetDataLayerShortName ( [UDataLayerInstance](API\Runtime\Engine\WorldPartition\DataLayer\UDataLayerInstance) * InDataLayerInstance, const [FString](API\Runtime\Core\Containers\FString) & InNewShortName )